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Asynio library errors when running rdp.StreamingPrices simple test

asynio library error once every several minutes(~4 mins)

Using Python v3.9.1. Latest RDP libraries via python -m pip install --upgrade refinitiv.dataplatform

The message is like this: (with DEBUG logging enabled)

2021-01-13 01:13:52,214 - websocket - ERROR - error from callback <bound method StreamConnection._ws_message of <OMMStreamConnection(WebSocket 0 - pricing, started daemon 140170804320000)>>: Non-thread-safe operation invoked on an event loop other than the current one
File "/home/originai/trader/originai/signal/refinitiv/refinitiv-env/lib/python3.6/site-packages/websocket/", line 344, in _callback
File "/home/originai/trader/originai/signal/refinitiv/refinitiv-env/lib/python3.6/site-packages/refinitiv/dataplatform/delivery/stream/", line 838, in _ws_message
File "/home/originai/trader/originai/signal/refinitiv/refinitiv-env/lib/python3.6/site-packages/refinitiv/dataplatform/delivery/stream/", line 239, in _on_messages

File "/home/originai/trader/originai/signal/refinitiv/refinitiv-env/lib/python3.6/site-packages/refinitiv/dataplatform/delivery/stream/", line 341, in _process_response_message
File "/home/originai/trader/originai/signal/refinitiv/refinitiv-env/lib/python3.6/site-packages/refinitiv/dataplatform/delivery/stream/", line 671, in _on_receive_login_message
File "/usr/lib/python3.6/asyncio/", line 298, in set_result
File "/usr/lib/python3.6/asyncio/", line 214, in _schedule_callbacks
self._loop.call_soon(callback, self)
File "/usr/lib/python3.6/asyncio/", line 593, in call_soon
File "/usr/lib/python3.6/asyncio/", line 632, in _check_thread
"Non-thread-safe operation invoked on an event loop other "
2021-01-13 01:14:07,449 - Session session.platform - Thread 140170804320000 | WebSocket 0 - pricing

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Hi @michael.earl

Are you able to post the code here or even a smaller snippet which recreates the issue?

Easiest would be if you can attach it as a .txt file.

Hi Umer,

I attached the code asyncio_test_20210113.txt

Please change the login credential to give it a try.

Thanks for taking a look!

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Hi @cychiang

Thanks for the pip list, I have passed it onto the RDP Python dev team to examine.

In the meantime, if you are able to do so (ideally in a virtualenv), you could try out the version I am using on my PC v1.0.0a7 - available on PyPI - refinitiv-dataplatform · PyPI

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Hi Umer,

I can confirm that after using v1.0.0a7, and python 3.9, your workaround can avoid the issue.

However, if I use .run_forever() the issue still happens, so I think there is still something wrong in the library. But I am fine with the workaround.

BTW, I found that v1.0.0a7 uses asyncio differently (e.g. asyncio.create_task) such that I can not keep using python3.6. I have to update to python 3.9, and it created some pain. I am afraid that other users might get hit by the same issue.


25.3k 87 12 25

Hi @michael.earl / @cychiang

When I ran your snippet it crashed almost immediately after getting the first Refresh Messages.

However, if I replace the last line of code with something like:

while (True):

Then It ran fine for over 10 minutes without a problem.

Please let me know if the above works for you also.

I am not a Python expert so cannot explain why the above is ok and your alternative is not. I will refer this to the RDP Python library development team and hopefully, they will respond with an explanation.

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Thank you Umer, I will use your method and keep it running for a day and report back.

Note that I have been advised there is a bug in rdp library version 1.0.0a7.post1 with refreshing the access token every 4-5 minutes. I am still using version 1.0.0a7 and perhaps that is why it is working for me.

If the above-suggested code change fails for you, please run the 'pip list' command in a Python console and attach the output as .txt file in your reply.

You can confirm your RDP library version with:

import refinitiv.dataplatform as rdp

Hi Umer,

I am using 1.0.0a5 version.


The while loop method can not avoid the issue.

It still happened once every two~three minutes in my testing.


pip-list.txt (598 B)

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